They sure don't mention that in the specs or the manual that I can see, usually not a good sign.
The Intel J1900 processor on this board includes graphics that supports two monitors. Check the specs page here:
ARK | Intel® Celeron® Processor J1900 (2M Cache, up to 2.42 GHz)
But, notice the little '‡' symbol in the "# of Displays Supported ‡" line. That alerts us to the fine print:
‡ This feature may not be available on all computing systems. Please check with the system vendor to determine if your system delivers this feature, or reference the system specifications (motherboard, processor, chipset, power supply, HDD, graphics controller, memory, BIOS, drivers, virtual machine monitor-VMM, platform software, and/or operating system) for feature compatibility. Functionality, performance, and other benefits of this feature may vary depending on system configuration.